Fig. 3From: Enhanced Photoelectrochemical Activity of ZnO-Coated TiO2 Nanotubes and Its Dependence on ZnO Coating Thickness a XRD patterns and b Raman scattering spectra of bare TiO2 NTs (1), 10-cycle ZnO/TiO2 NTs (2), and 25-cycle (3) ZnO/TiO2 NTs. The XRD patterns and Raman scattering spectra are moved vertically for clarityBack to article page